Title :
Quad-phase synchronous light detection with 64 X 64 CMOS modulated light camera
Author :
Johnston, N.S. ; Stewart, Craig ; Light, R.A. ; Hayes-Gill, B.R. ; Somekh, M.G. ; Morgan, S.P. ; Sambles, J.R. ; Pitter, M.C.
Author_Institution :
Inst. of Biophys., Imaging & Opt. Sci., Univ. of Nottingham, Nottingham, UK
Abstract :
A scalable 64times64 array of feedback buffered photodiodes with column level demodulation circuitry has been fabricated in a 0.35 mum CMOS process. The camera provides two-dimensional phase-sensitive imaging on a line-scan basis using 64 independent quad-phase demodulation channels. Using four phases suppresses even harmonics, enabling the array to be used for heterodyne demodulation.
Keywords :
CMOS image sensors; cameras; demodulation; 2D phase-sensitive imaging; CMOS modulated light camera; heterodyne demodulation; quad-phase demodulation channels; quad-phase synchronous light detection; size 0.35 mum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1182
